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| author | Yazen Ghannam <yazen.ghannam@amd.com> | 2026-09-03 10:43:25 -0500 |
|---|---|---|
| committer | Borislav Petkov (AMD) <bp@alien8.de> | 2026-09-10 18:05:43 -0700 |
| commit | 27600805e62f800bacf990354632eae4e487d34c (patch) | |
| tree | e8aec0ddfaa0bc264d79af632e3de3f1b75ae4c8 /Documentation/gpu/nova/index.rst | |
| download | linux-stable-27600805e62f800bacf990354632eae4e487d34c.tar.gz linux-stable-27600805e62f800bacf990354632eae4e487d34c.zip | |
x86/amd_node: Fix PCI device reference counting in amd_smn_init()grafted
The local "root" pointer is a temporary variable used during the device
search. Therefore, refcount related to the search iterators should be cleaned
up after the search is complete.
Use the __free() cleanup macro to ensure the refcount is decremented when the
temporary pointer goes out of scope.
Additionally, increment the refcount when caching a root pointer. This ensures
the in-use refcount is separate from the temporary search refcounting.
Finally, drop the redundant "root = NULL" before the second search loop. The
pci_get_class() iterator always decrements the refcount of its "from"
argument, so the first loop can only fall through with "root" already NULL.
Fixes: 0a4b61d9c2e4 ("x86/amd_node: Fix AMD root device caching")
Closes: https://sashiko.dev/#/patchset/20260806160159.230453-1-jason.andryuk%40amd.com
Reported-by: Sashiko <sashiko-bot@kernel.org>
Assisted-by: LLM
Signed-off-by: Yazen Ghannam <yazen.ghannam@amd.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org>
Cc: <stable@kernel.org>
Link: https://patch.msgid.link/20260903154325.74343-1-yazen.ghannam@amd.com
Diffstat (limited to 'Documentation/gpu/nova/index.rst')
| -rw-r--r-- | Documentation/gpu/nova/index.rst | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/Documentation/gpu/nova/index.rst b/Documentation/gpu/nova/index.rst new file mode 100644 index 000000000..2afa58e8f --- /dev/null +++ b/Documentation/gpu/nova/index.rst @@ -0,0 +1,36 @@ +.. SPDX-License-Identifier: (GPL-2.0+ OR MIT) + +======================= +nova NVIDIA GPU drivers +======================= + +The nova driver project consists out of two separate drivers nova-core and +nova-drm and intends to supersede the nouveau driver for NVIDIA GPUs based on +the GPU System Processor (GSP). + +The following documents apply to both nova-core and nova-drm. + +.. toctree:: + :titlesonly: + + guidelines + +nova-core +========= + +The nova-core driver is the core driver for NVIDIA GPUs based on GSP. nova-core, +as the 1st level driver, provides an abstraction around the GPUs hard- and +firmware interfaces providing a common base for 2nd level drivers, such as the +vGPU manager VFIO driver and the nova-drm driver. + +.. toctree:: + :titlesonly: + + core/guidelines + core/todo + core/vbios + core/devinit + core/fsp + core/fwsec + core/falcon + core/tlv |